that is one of the maddening things about smartphones in general. they do things that are inexplicable, and then, they may never, ever do that thing again. My Tbolt turned off all by itself on third day I had it. I powered it back up, and it has never done it again since that day, almost a month ago. My Eris did the same kind of crazy stuff. One weird occurence, then it never happens again. go figure.